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勾股定理证明
Author:
万超杰
GeoGebra
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異分母分數減法
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
GeoGebra笔记功能体验课件
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三角柱體的截面
畢氏定理
陳允杰 橢圓反射
Copy of 均分除法（分數÷整數）
operation of matrix
Discover Topics
Hyperbola
Symmetry
Perimeter
Logarithm
Arithmetic Operations